JP5154599B2 - Gas fume collector - Google Patents

Description

  The present invention relates to a gas fusing smoke collecting apparatus, which does not particularly require a large suction capacity, can efficiently collect and collect dust, can quickly extinguish smoke, and can be used both indoors and outdoors. It relates to a compact device.

  Scrap generated in steelworks, such as steel scraps such as plating coils, electromagnetic coils, or H-shaped steel, slab scraps, recovered scraps, etc., are fused to an appropriate size by a gas cutter and used as an iron source on the premises. Many.

  There are two types of gas cutting of steel, indoor and outdoor. In either case, yellow or white visual smoke is generated, and the steel grade is zinc or tin, etc. In the case of alloy steels such as Ni and Cr, visual smoke may become very dense, which not only deteriorates the working environment but also raises concerns about the generation of harmful components.

  When performing gas fusing indoors, cover the work area where gas fusing is performed with a large hood to collect or collect dust (Patent Document 1), or cover the work area with multiple hoods and use the selected hood. While collecting and collecting dust, suspended particles contained in visual smoke are captured with a bag filter or an electric dust collector and smoke extinguished (Patent Document 1, Patent Document 2). In practice, no measures were taken, and the fact was that visual smoke was released into the atmosphere.

JP 2006-122970 A Japanese Utility Model Publication No. 05-93659

However, in the apparatus described in Patent Document 1, the entire work area is covered with a hood, but a large space that can accommodate the steel material to be melted is required, and thus a large capacity suction capacity of, for example, about 2000 to 3000 m ³ / min. The equipment cost becomes high.

  In addition, even after the gas fusing operation was completed, visual smoke continued to be generated for a while, and the suction equipment had to be operated during that time.

  On the other hand, the device described in Patent Document 2 selects a hood to be operated from among a plurality of devices and efficiently collects and collects dust with a relatively small suction capacity. Since it is scattered by receiving a high-pressure combustion flame, it is actually necessary to operate a large number of hoods, and although it is small compared to Patent Document 1, it still requires a large suction capacity and the equipment cost becomes high. The actual situation is that no measures have been taken for persistent smoke.

  In view of such problems, the present invention does not require a large suction capacity, can efficiently collect and collect dust, and can quickly extinguish smoke from smoke, and can be used both indoors and outdoors. It is an object of the present invention to provide a gas collecting device for gas melting.

  Therefore, the gas fume collecting device according to the present invention is arranged on the floor surface with a space between each other, the work to be fused is mounted in the work area, and the gas fusing combustion flame is blown with fusing smoke and fusing soot. A plurality of mounts that can be spouted downward while being rolled in, and installed between the mounts and cooled by receiving and cooling the fusing spear scattered downward by the combustion flame of gas fusing A plurality of water tanks that extinguish persistent smoke, a suction duct that is provided behind the plurality of mounts and has a suction port opened above each of the plurality of water tanks, and a suction force acting on the suction duct A suction facility that sucks the blown smoke due to gas blown down between the gantry and sucks it into the suction duct from the suction port, a dust collector that captures suspended particles from the blown smoke sucked into the suction duct, Characterized by comprising.

  By the way, when examining the situation of visual smoke generated during gas fusing work, there are fusing smoke generated by gas fusing and persistent smoke that continues to be generated from high-temperature flaws for a while after the fusing. Since fusing smoke and continuous smoke are exposed to a high-temperature combustion flame and are hot, they tend to diffuse upward. In the conventional apparatus, the upper part of the work area is covered with a hood, and the blown smoke and the persistent smoke that diffuses upward are sucked.

  One of the features of the present invention is that a suction duct is provided behind the plurality of mounts, the suction port of the suction duct is opened between the mounts, and the blown smoke is sucked downward between the mounts and sucked into the suction duct. It is in the point.

  Thus, the blown smoke is sucked into a narrow space between the gantry. In addition, since the blown smoke is trapped in the combustion flame blown out at a high speed when the gas is blown and is sent downward, it is less likely to be dissipated to the atmosphere, so that the blown smoke can be reliably sucked with a small suction ability.

  The second feature of the present invention resides in that a melting flame is entrained in a combustion flame which is sprayed downward at a high speed when the gas is melted and scattered downward, and is received in a water tank to cool the hot flame.

  As a result, the high-temperature melted soot is quickly cooled to reduce the generation of persistent smoke, and it is not necessary to suck a large amount of persistent smoke. As a result, since the continuous smoke can be reduced in addition to the above-described efficient suction of the blown smoke, the suction ability can be greatly reduced.

  Moreover, the high-temperature combustion flame at the time of gas melting collides with the water surface in the water tank, and the water in the water tank becomes a large amount of droplets and is sucked into the suction port and led to the dust collector. Although the temperature immediately after the fusing smoke is about 200 ° C, the temperature is reduced to about 40 ° C by mixing with the splashed water, so compared with the case where the fusing smoke is sucked as it is. Thermal damage to the dust collector filter can be reduced.

  According to the experiments by the present inventors, the diffusion of visible smoke at the time of gas fusing can be almost eliminated by the improvement of the above-described two points of the downward suction method of fusing smoke and the extinction of continuous smoke. It was found that the smoke leaked upward when it was affected.

  In view of this, a wind exhaust cover having a shape in which the back surface has an arc shape and the side surface is sealed and the front surface is open is prepared. The exhaust cover covers the space behind the fusing work on the work area on the gantry and exhausts it. A wind return duct is installed along the upper edge of the exhaust cover, and exhaust air from the dust collector is blown downward along the rear surface of the exhaust cover from the exhaust return duct, so that the upper side smoke is caught between the frames. When it was directed toward the top, the upward smoke leakage could be guided from the suction port of the suction duct to the dust collector.

  Further, since the upward smoke leakage is collected using the exhaust air of the dust collector, there is no need to use a blower or the like, which is excellent in terms of energy saving.

  Further, the gas fusing device according to the present invention can surely suck and extinguish the gas fusing visual smoke without being diffused into the atmosphere even if the wind is blowing, and the device can be configured compactly. So it can be installed both inside and outside the building.

  In particular, when fusing work is performed indoors where a large-capacity dust collector cannot be installed, the visible smoke due to fusing fills up indoors, and the working environment tends to be worse than outdoors. The smoke collecting device of the present invention can efficiently collect blown smoke with a small suction capacity and can quickly extinguish smoke. Therefore, the smoke collecting device can be easily installed indoors, and can also be installed outdoors with wind. Can also be installed, and its practical effect is great.

It is a schematic front view which shows preferable embodiment of the smoke collector of the gas fusing which concerns on this invention. It is a schematic side view which shows the said embodiment.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 and 2 show a preferred embodiment of a gas fusing smoke collecting apparatus according to the present invention. In the drawing, a plurality of mounts 10 are arranged at intervals on the floor surface, and a work area 220 for mounting a work 200 to be melted is formed on the mounts 10.

  A water tank 20 is installed between the plurality of mounts 10, and a suction duct 30 extends in the lateral direction behind the plurality of mounts 10, and a suction port 30 </ b> A of the suction duct 30 is directly above the water tank 20 between the mounts 10. The suction duct 30 is connected to a dust collection chamber 40 </ b> A of a cyclone built-in dust collector (suction facility / dust collector) 40.

  A post-processing device 60 is connected to the dust collector 40 so that the blown smoke after trapping the suspended particles is post-processed such as cooling and diffused from the exhaust duct 70 to the atmosphere. The dust collector 40 and the post-processing device 70 are stored in a storage shelf together with the operation panel 60.

  A wind exhaust cover 90 is provided on the plurality of mounts 10 so as to cover the back of the space for performing the fusing work on the work area 220. The wind exhaust cover 90 has a cross-sectional arc shape on the back surface, the side surface is sealed, and the front surface is open. It is manufactured in the form.

  The exhaust cover 90 is provided with an exhaust return duct 70 along the upper edge of the exhaust cover 90, one end of the exhaust return duct 70 is connected to the exhaust duct 70, the other end is sealed, and the exhaust return The duct 70 is formed with a plurality of jet outlets arranged in the longitudinal direction, and the exhaust air of the dust collector 40 is jetted downward along almost the entire rear surface of the exhaust cover 90.

  For example, when gas cutting of the coil scrap 200 is performed, the coil scrap 200 is mounted on the work area 220 of the gantry 10 using a forklift or a crane. In addition, the dust collector 40 is operated, and the operator holds the gas cutter 100 and ignites by mixing a combustible gas such as high-pressure and high-speed propane and acetylene and a combustion promoting gas (oxygen) to ignite the high-temperature and high-pressure combustion flame 100A. Erupt.

  In this state, the suction force of the dust collector 40 acts on the suction duct 30, exhaust air is sent from the exhaust duct 70 to the exhaust air return duct 80, and the exhaust air 250 is ejected downward along the back surface of the exhaust air cover 90. Has been.

  When the worker causes the combustion flame 100A of the gas cutter 100 to collide with the coil 200, the coil 200 is blown, and at this time, blown smoke 230 and blown soot 210 are generated.

  The generated fusing smoke 230 and fusing soot 210 are entrained in the high-temperature and high-speed combustion flame 100A and sent between the gantry 10, and the fusing smoke 230 is sucked into the suction duct 30 from the suction port 30A and blown in the dust collector 40. The fusing smoke 230 is extinguished by trapping and removing suspended particles in the 230, and is post-processed by the post-processing device 60, exhaust gas is released from the exhaust duct 770 to the atmosphere, and a part of the exhaust gas is exhausted return. It is sent to the duct 80.

  Since the melting rod 210 entrained in the combustion flame 100A falls into the water tank 20 between the gantry 10 and is cooled, the continuous smoke from the melting rod 210 is extinguished and hardly generated.

  Further, if wind blows on the blown smoke during the fusing work, there is a risk that the smoke leaks upward. However, the space behind the fusing work is covered with a wind exhaust cover 90, and the exhaust return duct 70 Since the exhaust air is jetted downward along the back surface of the exhaust cover 90, the upper smoke 240 is caught in the exhaust air and guided toward the frame 10, and is sucked into the suction duct 30 together with the blown smoke 230. And will not scatter upward.

The suction capability of the dust collector 40 can be greatly reduced by the efficient suction of the above-described blown smoke and the extinction of the continuous smoke. According to the experiments conducted by the present inventors, can be a suction capacity of the conventional device about 1/20 (150 to 200 m ³ / about min) of (2000~3000m ³ / about min), the equipment cost also requires only about 1/10 Was confirmed.

  Further, the high-temperature combustion flame 100A at the time of gas fusing collides with the water surface in the water tank 20, and the water in the water tank 20 becomes a large amount of droplets and is sucked into the suction port 30A of the suction duct 30 and guided to the dust collector 40. The temperature immediately after fusing of the fusing smoke 230 is about 200 ° C., but the temperature is reduced to about 40 ° C. by mixing with the splashed water droplets. Therefore, the heat damage of the filter in the dust collector 40 can be reduced.

10 frame 20 water tank 30 suction duct 30A suction port 40 dust collector (suction equipment / dust collector)
70 Exhaust Duct 80 Exhaust Air Return Duct 90 Exhaust Air Cover 100 Gas Cutting Device 100A Combustion Flame 200 Coil (Workpiece)
210 Fusing Pot 220 Working Area 230 Fusing Smoke 240 Upper Leakage 250 Ventilation

Claims (1)

A work (200) to be blown is placed on the floor surface with a space between each other, and the work area (220) is mounted on the work area (220), and a gas blown combustion flame (100A) is blown into a blown smoke (230) and a blown flame (210). A plurality of mounts (10) that can be ejected downward while entraining
A plurality of flames installed between the gantry (10) and receiving the blown soot (210) scattered downward by the gas blown combustion flame (100A) and cooling it to extinguish the continuous smoke of the melted soot (210) Aquarium (20),
A suction duct (30) provided behind the plurality of mounts (10) and having a suction port (30A) opened above each of the plurality of water tanks (20);
By applying a suction force to the suction duct (30), the blown smoke (230) due to gas cutting is sucked downward between the gantry (10) and from the suction port (30A) into the suction duct (30). A suction facility (40) for suction;
A dust collector (40) for capturing suspended particles from the blown smoke (230) sucked into the suction duct (30);
Exhaust cover (covering the back of the space where the fusing work is performed on the work area (220) on the gantry (10), the back is arcuate in cross section, the side is sealed and the front is open. 90),
An upper smoke leak (240) is provided along the upper edge of the exhaust cover (90), and the exhaust air of the dust collector (40) is ejected downward along the back surface of the exhaust cover (90). A wind return return duct (70) that is engulfed and guided between the gantry (10);
A fusing device for gas fusing, comprising:

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